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Class XII Biology Environmental Issues 1

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Question 1

In many species of predatory birds, thinning of egg shells is a major concern. It is due to:

Question 2

Select the correct statement from the following

Question 3

Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of

Question 4

Nutrient enrichment of water body is known as

Question 5

Effect of pollution is observed first on

Question 6

Pollution of big cities can be controlled to large extent by-

Question 7

In the treatment of waste water discharge, which treatment stage involves biological treatment

Question 8

Organisms used as indicator of water quality is

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Jul 12NEET & AIIMS